College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China.
Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Bioresour Technol. 2022 Mar;347:126338. doi: 10.1016/j.biortech.2021.126338. Epub 2021 Nov 17.
Large area requirements and huge energy consumption restrict the applications of microalgae in wastewater treatment. In this study, in-situ nutrient removal was tested using a floating permeable nutrients uptake system with pore sizes of 1, 5, 10, and 40 µm, and Chlorella sorokiniana and Scenedesmus acuminatus. Results showed that N transfer rate across FPNUS varied with membrane pore size and N-type. Average transfer rate of NH-N, NO-N, and NO-N across 1 µm membrane was 2.6, 14.6, and 2.3 mg mh, respectively, sufficient to support microalgal growth. The NH-N and NO-N removal rate in shrimp wastewater reached 1.32 and 1.88 mg Ld, comparable to some BNR processes used in RAS. According to the developed area ratio prediction model, FPNUS to pond area ratio of 21% is sufficient to balance N loading of 0.05 mg Ld. These results indicate extraordinary potential of in-situ nutrient removal from wastewaters using FPNUS.
大面积需求和巨大的能源消耗限制了微藻在废水处理中的应用。在这项研究中，使用孔径为 1、5、10 和 40 μm 的漂浮式可渗透营养吸收系统，结合小球藻和斜生栅藻进行原位营养去除测试。结果表明，FPNUS 中的 N 迁移率随膜孔径和 N 型而变化。穿过 1 µm 膜的 NH-N、NO-N 和 NO-N 的平均迁移率分别为 2.6、14.6 和 2.3 mg mh，足以支持微藻生长。虾废水中的 NH-N 和 NO-N 去除率分别达到 1.32 和 1.88 mg Ld，可与 RAS 中使用的一些 BNR 工艺相媲美。根据开发的面积比预测模型，FPNUS 与池塘面积的 21%的比值足以平衡 0.05 mg Ld 的 N 负荷。这些结果表明，使用 FPNUS 从废水中进行原位营养去除具有非凡的潜力。
